Re: Computer Missing from AD

If you have more than one DC, machine could have logged on another DC
(though it would be very weird).
Well, now that you've checked group membership, I assume we should wait and
then look in the event log when/if any new computer account will be deleted.
Since there are no tracks from the past that we can use, I'm afraid this is
all we can do now.

--
Dmitry Korolyov [d__k@xxxxxxxxxxxxxxxxxxxxxx]
MVP: Windows Server - Directory Services


"Ben Dailey" <anonymous@xxxxxxxxxxx> wrote in message
news:OmJQrpIrFHA.3068@xxxxxxxxxxxxxxxxxxxxxxx
> Thanks for your response - in answer to your questions:
> 1) Not sure now as I have fixed these issues - something like 'domain
> controller could not be found'.
> 2) No
> 3) Yes
> 4) Have now
> 5) Have now
> 6) Done
>
> One interesting thing I noticed looking through the security log is that
> there is no past record of the machine ever logging on, even though the
> user had no trouble logging in.
>
> "Dmitry Korolyov [MVP]" <d__k@xxxxxxxxxxxxxxxxxxxxxx> wrote in message
> news:OjBraJArFHA.3836@xxxxxxxxxxxxxxxxxxxxxxx
>> 1) what error message do you see when you try to log in from any of these
>> two computers?
>> 2) are you able to find them through ADUC (using search) or not?
>> 3) Are you sure that these computer accounts have not been moved to some
>> other OU, instead of being deleted?
>> 4) Have you checked the membership of this domain's Domain Admins and
>> Administrators group, and forest root domain's Enterprise Admins group to
>> make sure they don't contain any accounts and groups they should not
>> contain?
>> 5) Have you checked the membership of other vital groups, such as Account
>> Operators?
>>
>> 6) I would recommend you to enable audit for deletion of computer
>> objects, and next time you will be able to get information about the
>> account that was used for the operation from the security event log on
>> the DC.
>>
>> --
>> Dmitry Korolyov [d__k@xxxxxxxxxxxxxxxxxxxxxx]
>> MVP: Windows Server - Directory Services
>>
>>
>> "Ben Dailey" <anonymous@xxxxxxxxxxx> wrote in message
>> news:OzW9uTqqFHA.3836@xxxxxxxxxxxxxxxxxxxxxxx
>>> Hi,
>>>
>>> I have the same problem described in the post by xor on 11 July 2005
>>> 'Missing Computers Object in AD'.
>>>
>>> I have had two computers disappear from the Active Directory in the last
>>> week. I am the only user with administrative rights over the domain and
>>> I know I have not removed them.
>>>
>>> When a user attempts logon at these machines (XP Pro SP2) they can't and
>>> further investigations have shown that their machines are no longer
>>> listed in the directory.
>>>
>>> There is nothing in the event log to indicate why this has happened.
>>>
>>> Does anyone have any ideas? Any help much appreciated.
>>>
>>> Cheers.
>>>
>>> Ben.
>>>
>>
>>
>
>


.

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